.banner {
    height: 470px;
    width: 100%;
    min-width: 1400px;
    position: relative;
}

.banner li {
    height: 470px;
    width: 100%;
    overflow: hidden;
    position: absolute;
    top: 0;
    left: 0;
    display: none;
}

.banner li img {
    width: 100%;
    height: 470px;
    object-fit: cover;
}

.banner .dots {
    position: absolute;
    z-index: 100;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    justify-content: center;
}

.banner .dots span {
    display: block;
    width: 100px;
    height: 10px;
    background: #fff;
    margin-left: 20px;
    margin-right: 20px;
    border-radius: 10px;
    cursor: pointer;
}

.banner .dots .active {
    background: #f30;
}